CN110737540A - Recovery optimization method, device, equipment and storage medium for SSD read exception - Google Patents
Recovery optimization method, device, equipment and storage medium for SSD read exception Download PDFInfo
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- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0706—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
- G06F11/0727—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment in a storage system, e.g. in a DASD or network based storage system
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- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
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Abstract
The invention discloses recovery optimization methods, devices, equipment and storage media for SSD reading abnormity, which comprises a step S1 of obtaining a reading instruction through a front end module, a step S2 of putting the reading instruction into an FIFO submodule of a BM module through the front end module and synchronizing the reading instruction to an FIFO hardware command of the BM module, a step S3 of executing a data transmission process, a step S4 of judging whether the command of the front end module is overtime or not, a step S5 of forbidding to obtain the reading instruction again, a step S6 of judging whether an unexecuted command exists in a rear end module or not, if not, the front end module replies the command to be completed and finishes the process, if so, remaining commands in the FIFO hardware command are marked as useless commands, and a step S7 of directly replying the command to be completed and returning to execute the step S6 when the rear end module detects the useless commands.
Description
Technical Field
The invention relates to the technical field of computers, in particular to recovery optimization methods, devices, equipment and storage media for SSD reading abnormity.
Background
With the high-speed development of Solid State Disks (SSDs), the requirements for security and stability of the SSDs are greatly improved, and when the SSDs fail to read data from the particles, it is easy to cause a timeout of a read command issued by a host, resulting in a full-disk hang-up state, which may reduce the security and stability of the SSDs. In the prior art, by using a method for recovering read exception of a solid state disk, although partial exception can be recovered, if a back-end command is executed too long, the possibility of command timeout due to failure of timely reply of a front-end command still exists, and therefore, the performance of the solid state disk can be greatly reduced in a process of waiting for completion of the back-end command.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
For the reasons, the invention provides recovery optimization methods, devices, equipment and storage media for SSD read exception.
Disclosure of Invention
To meet the above requirements, an th object of the present invention is to provide recovery optimization methods for SSD read exceptions.
It is a second object of the present invention to provide means for recovery optimization of SSD read exceptions.
It is a third object of the present invention to provide computer devices for SSD read exception recovery optimization.
It is a fourth object of the present invention to provide non-transitory computer readable storage media having a computer program stored thereon.
In order to achieve the purpose, the invention adopts the following technical scheme:
a recovery optimization method for SSD read exceptions, comprising the steps of:
step S1, a read instruction is obtained through the front end module;
step S2, the read instruction is put into the FIFO submodule of the BM module through the front end module, and the read instruction is synchronized to the FIFO hardware command of the BM module;
step S3, executing a data transmission flow;
step S4, judging whether the command of the front-end module is overtime;
step S5, prohibiting the read instruction from being acquired again;
step S6, judging whether the back end module has a command which is not executed;
if the command does not exist, the front-end module replies that the command is completed, and the process is ended;
if yes, marking the rest commands in the FIFO hardware command as useless commands;
step S7, when the back end module detects the useless command, directly replying the command to the completion, and returning to execute step S6.
, the data transmission process includes:
a substep Q1, driving the BM module to fetch the data transmitted by the rear-end module;
a substep Q2, enabling the back-end module to obtain a read command from the FIFO submodule, and enabling the back-end module to issue a descriptor to read data from the particles in the SSD;
a substep Q3, making the back end module transfer the read data to the BM module;
a substep Q4, judging the integrity and consistency of the data read by the back end module through the BM module;
if the data read by the rear end module meets required by the read instruction, the data read by the rear end module is carried to the front end module, the command is completed, and the flow is ended;
if the data read from the back-end module does not result in being requested by the read command, go to step S4.
, the FIFO submodule includes a FIFO program and FIFO hardware that can be executed by the processor.
The step is for the FIFO hardware to mark the remaining commands in the FIFO hardware commands as useless commands.
, the FIFO procedure transmits a read command to the back-end module.
, the read command is issued by the processor.
, the front-end module replies to the processor that the command is complete.
The step is that the back-end module replies to the processor that the command is complete.
The invention also discloses kinds of devices for SSD reading abnormity recovery optimization, which comprise the following units:
the instruction acquisition unit is used for acquiring a read instruction through the front-end module;
the instruction synchronization unit is used for putting the read instruction into an FIFO submodule through a front-end module and synchronizing the read instruction to an FIFO hardware command of the BM module;
a data transmission unit for executing a data transmission flow;
the overtime judging unit is used for judging whether the command of the front-end module is overtime or not;
an instruction inhibiting unit configured to inhibit a read instruction from being fetched again;
the command judging unit is used for judging whether a command which is not executed exists in the back-end module; if the command does not exist, the front-end module replies that the command is completed, and the process is ended; if yes, marking the rest commands in the FIFO hardware command as useless commands;
and the command completion unit is used for directly replying command completion and returning to the command judgment unit when the back-end module detects the useless command.
, the data transmission unit comprises a driving subunit, a data reading subunit, a data carrying subunit and a data judging subunit;
the drive subunit is used for driving the BM module to take the data transmitted by the rear-end module;
the data reading subunit is used for enabling the back-end module to obtain a reading instruction from the FIFO submodule, and the back-end module issues a descriptor to read data from particles in the SSD;
the data carrying subunit is used for enabling the rear-end module to carry the read data to the BM module;
the data judgment subunit is used for judging the completeness and consistency of the data read by the back end module through the BM module, carrying the data read by the back end module to the front end module to complete a command and end the flow if the data read by the back end module meets requirements of the read command, and returning to the command judgment unit if the data read by the back end module meets requirements of the read command.
The invention also discloses computer equipment for SSD read exception recovery optimization, which comprises a memory, a processor and a recovery optimization program for SSD read exceptions, wherein the recovery optimization program is stored on the memory and can run on the processor, and when being executed by the processor, the recovery optimization program for SSD read exceptions realizes the recovery optimization method for SSD read exceptions described in any .
The present invention also discloses non-transitory computer readable storage media having stored thereon a computer program that when executed by a processor implements a recovery optimization method for SSD read exceptions as described in any of items above.
Compared with the prior art, the invention has the beneficial effects that: by adopting the scheme for recovering and optimizing the SSD read abnormity, through a mode of synchronizing software and hardware commands of the FIFO module, when the read abnormity occurs, the FIFO hardware can automatically mark the read command as an error command, the hardware for acquiring the error command does not need to execute, and the software can directly reply the completion state to the processor. By the method, the process of waiting for the back end to execute the legacy command can be reduced, the risk of overtime reply of the front end command can be greatly reduced, and the stability and efficiency of the SSD are improved.
The invention is further described with reference to the figures and the specific embodiments.
Drawings
FIG. 1 is a flow chart illustrating an embodiment of recovery optimization method for SSD read exceptions according to the present invention;
FIG. 2 is a flow diagram of an embodiment of the data transmission flow of FIG. 1;
FIG. 3 is a schematic diagram of the solid state disk data transmission framework of FIG. 1;
FIG. 4 is a schematic diagram of a data transmission optimization synchronization process of the solid state disk of FIG. 1;
FIG. 5 is a schematic diagram illustrating a read exception recovery process of the solid state disk of FIG. 1;
FIG. 6 is a block diagram of a specific embodiment of apparatus for recovery optimization of SSD read exceptions;
FIG. 7 is a block diagram of a specific embodiment of a framework composition of computer devices for recovery optimization of SSD read exceptions.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.
It will be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of or or more other features, integers, steps, operations, elements, components, and/or groups thereof.
As used in this specification and the appended claims, the singular forms "", "" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Fig. 1 is a flowchart of a recovery optimization method for SSD read exceptions according to an embodiment of of the present invention, which includes the following steps:
step S1, a read instruction is obtained through the front end module;
step S2, the read instruction is put into the FIFO submodule of the BM module through the front end module, and the read instruction is synchronized to the FIFO hardware command of the BM module; BM module, is used for buffering the data, carrying the data, mark the order;
step S3, executing a data transmission flow;
step S4, judging whether the command of the front-end module is overtime;
step S5, prohibiting the read instruction from being acquired again;
step S6, judging whether the back end module has a command which is not executed;
if the command does not exist, the front-end module replies that the command is completed, and the process is ended;
if yes, marking the rest commands in the FIFO hardware command as useless commands;
step S7, when the back end module detects the useless command, directly replying the command to the completion, and returning to execute step S6.
In the embodiment shown in fig. 2, the data transmission process includes:
a substep Q1, driving the BM module to fetch the data transmitted by the rear-end module;
a substep Q2, enabling the back-end module to obtain a read command from the FIFO submodule, and enabling the back-end module to issue a descriptor to read data from the particles in the SSD;
a substep Q3, making the back end module transfer the read data to the BM module;
a substep Q4, judging the integrity and consistency of the data read by the back end module through the BM module;
if the data read by the rear end module meets required by the read instruction, the data read by the rear end module is carried to the front end module, the command is completed, and the flow is ended;
if the data read from the back-end module does not result in being requested by the read command, go to step S4.
In a preferred embodiment, the FIFO submodule includes a FIFO program and FIFO hardware that are executable by the processor.
Preferably, the FIFO hardware marks remaining commands in the FIFO hardware commands as useless commands.
In a preferred embodiment, the FIFO program passes read commands to the back-end module.
In a preferred embodiment, the read instruction is issued by a processor.
In a preferred embodiment, the front end module replies to the processor that the command is complete.
In a preferred embodiment, the back end module replies to the processor that the command is complete.
In order to implement the above steps, the Solid State Disk (SSD) reading process is optimized, and the block diagram is shown in fig. 3;
as a preferred embodiment, software and hardware commands of the solid state disk need to be kept synchronous, when a read exception occurs, the hardware can automatically mark the command as an error command, the hardware does not need to execute, and the software can directly reply to a completion state, and a specific optimized synchronization flowchart is shown in fig. 4, wherein if and only after a back-end module receives a read command of the processor and a data handling request of the BM at the same time, the back-end module can issue a descriptor to read NAND data (data stored in the SSD), specifically, the method includes the following steps:
1. the host computer issues a reading instruction;
2. the front-end module puts the read command into an FIFO program and synchronizes the read command into an FIFO hardware command of the BM module;
3. driving the BM module to move data transmitted by the rear-end module;
4. the back end module acquires a read command from the FIFO program and issues a descriptor to read data from the particles;
5. the back end module carries the data to the BM module;
6, the BM module judges the integrity of the data and judges whether the data is result;
7. if the data is correct, the data is transported to the front-end module to complete the command;
8. if the data is not , generating data exception, and the front-end module command is overtime;
the recovery flow of the read exception of the solid state disk is shown in fig. 5:
as a preferred embodiment, when an abnormality occurs, the detailed implementation process of the above steps S4-S7 is shown in fig. 5, and specifically, it includes the following steps:
9. when the host command is abnormal and the reply completion command cannot be obtained, the system forbids to receive the processor command;
10. judging whether a command is not executed in the back-end module;
11. if not, the front-end module replies that the command is completed;
12. if yes, the hardware automatically marks the residual commands in the FIFO hardware commands of the BM module as useless commands;
13. the back end module detects that the command is a useless command and directly replies the command to complete;
14. returning to execute the step 10;
through the steps 9 to 14 and the steps 1 to 8 matched with the optimized synchronization process, recovery optimization of the read exception of the solid state disk is realized, and the recovery optimization method can be used as specific implementation modes of the recovery optimization method for the SSD read exception, so that the process of waiting for the back end to execute the legacy command is reduced, the risk of overtime reply of the front end command is greatly reduced, and the stability and the efficiency of the SSD are improved.
As shown in FIG. 6, the invention also discloses kinds of devices for SSD read exception recovery optimization, which comprises the following units:
an instruction obtaining unit 100, configured to obtain a read instruction through a front-end module;
the instruction synchronization unit 200 is used for putting the read instruction into an FIFO submodule through a front-end module and synchronizing the read instruction to an FIFO hardware command of the BM module;
a data transmission unit 300 for performing a data transmission flow;
a timeout determining unit 400, configured to determine whether there is a command timeout of the front-end module;
an instruction inhibiting unit 500 for inhibiting the fetch of the read instruction again;
a command determining unit 600, configured to determine whether a command that is not yet executed exists in the back-end module; if the command does not exist, the front-end module replies that the command is completed, and the process is ended; if yes, marking the rest commands in the FIFO hardware command as useless commands;
a command completion unit 700, configured to, when the backend module detects an idle command, directly reply to command completion and return to the command determination unit 600.
, the data transmission unit 300 includes a driving subunit 301, a data reading subunit 302, a data carrying subunit 303, and a data determining subunit 304;
the driving subunit 301 is configured to drive the BM module to fetch data transmitted by a rear-end module;
the data reading subunit 302 is configured to enable the back-end module to obtain a read instruction from the FIFO submodule, where the back-end module issues a descriptor to read data from a granule in the SSD;
the data carrying subunit 303 is configured to enable the back-end module to carry the read data to the BM module;
the data judgment subunit 304 is configured to judge integrity and consistency of data read by the back-end module through the BM module, if the data read by the back-end module meets requirements of the read instruction, carry the data read by the back-end module to the front-end module, complete a command and end a flow, and if the data read by the back-end module meets requirements of the read instruction, return to the command judgment unit.
As shown in fig. 7, the present invention also discloses computer devices for SSD read exception recovery optimization, which includes a memory 800, a processor 900, and a recovery optimization program for SSD read exceptions stored on the memory 800 and executable on the processor 900, and when executed by the processor 900, the recovery optimization program for SSD read exceptions implements the recovery optimization method for SSD read exceptions as described in any of items above.
The Memory may be, but is not limited to, a Read-Only Memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that may store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a compact disc Read-Only Memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
The present invention also discloses non-transitory computer readable storage media having stored thereon a computer program that when executed by a processor implements a recovery optimization method for SSD read exceptions as described in any of items above.
The storage medium may be an internal storage unit of the aforementioned server, such as a hard disk or a memory of the server, or an external storage device of the device, such as a plug-in hard disk provided on the device, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. further , the storage medium may include both the internal storage unit and the external storage device of the device.
It should be noted that, as will be clear to those skilled in the art, specific implementation processes of the above apparatus, the computer device and the units may refer to corresponding descriptions in the foregoing method embodiments, and for convenience and brevity of description, no further description is provided herein.
Those of ordinary skill in the art will appreciate that the various illustrative means and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of the function for clarity of explanation of interchangeability of hardware and software.
For example, the above-described device embodiments are merely illustrative, for example, the division of the units into only logical functional divisions, and there may be additional divisions in actual implementation, for example, units or components may be combined or integrated into another systems, or features may be omitted, or not implemented.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs. The units in the device of the embodiment of the invention can be merged, divided and deleted according to actual needs.
In addition, the functional units in the embodiments of the present invention may be integrated into processing units, or each unit may exist alone physically, or two or more units are integrated into units.
Based on the understanding that the technical solution of the present invention is essentially or partially contributed to by the prior art, or that all or part of the technical solution can be embodied in the form of a software product stored in storage media, which includes several instructions for causing computer devices (which may be personal computers, terminals, or network devices, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. A recovery optimization method for SSD read exceptions, comprising the steps of:
step S1, a read instruction is obtained through the front end module;
step S2, the read instruction is put into the FIFO submodule of the BM module through the front end module, and the read instruction is synchronized to the FIFO hardware command of the BM module;
step S3, executing a data transmission flow;
step S4, judging whether the command of the front-end module is overtime;
step S5, prohibiting the read instruction from being acquired again;
step S6, judging whether the back end module has a command which is not executed;
if the command does not exist, the front-end module replies that the command is completed, and the process is ended;
if yes, marking the rest commands in the FIFO hardware command as useless commands;
step S7, when the back end module detects the useless command, directly replying the command to the completion, and returning to execute step S6.
2. The recovery optimization method for SSD read exceptions of claim 1, wherein the data transfer flow comprises:
a substep Q1, driving the BM module to fetch the data transmitted by the rear-end module;
a substep Q2, enabling the back-end module to obtain a read command from the FIFO submodule, and enabling the back-end module to issue a descriptor to read data from the particles in the SSD;
a substep Q3, making the back end module transfer the read data to the BM module;
a substep Q4, judging the integrity and consistency of the data read by the back end module through the BM module;
if the data read by the rear end module meets required by the read instruction, the data read by the rear end module is carried to the front end module, the command is completed, and the flow is ended;
if the data read from the back-end module does not result in being requested by the read command, go to step S4.
3. The recovery optimization method for SSD read exceptions of claim 2, wherein the FIFO submodule comprises a FIFO program executable by a processor and FIFO hardware.
4. The recovery optimization method for SSD read exceptions of claim 3, wherein the FIFO hardware marks remaining commands in the FIFO hardware commands as useless commands.
5. The recovery optimization method for SSD read exceptions of claim 3, wherein the FIFO program passes read commands to the back end module.
6. The recovery optimization method for SSD read exceptions of claim 1 where the read instruction is issued by a processor.
7. The recovery optimization method for SSD read exceptions of claim 1, wherein the front end module replies to the processor with a command completion.
8. The recovery optimization method for SSD read exceptions of claim 1, wherein the back end module replies to the processor with a command completion.
9. An apparatus for SSD read exception recovery optimization, comprising:
the instruction acquisition unit is used for acquiring a read instruction through the front-end module;
the instruction synchronization unit is used for putting the read instruction into an FIFO submodule through a front-end module and synchronizing the read instruction to an FIFO hardware command of the BM module;
a data transmission unit for executing a data transmission flow;
the overtime judging unit is used for judging whether the command of the front-end module is overtime or not;
an instruction inhibiting unit configured to inhibit a read instruction from being fetched again;
the command judging unit is used for judging whether a command which is not executed exists in the back-end module; if the command does not exist, the front-end module replies that the command is completed, and the process is ended; if yes, marking the rest commands in the FIFO hardware command as useless commands;
and the command completion unit is used for directly replying command completion and returning to the command judgment unit when the back-end module detects the useless command.
10. The apparatus of claim 9, wherein the data transmission unit comprises a driving subunit, a data reading subunit, a data handling module, a data determining module;
the drive subunit is used for driving the BM module to take the data transmitted by the rear-end module;
the data reading subunit is used for enabling the back-end module to obtain a reading instruction from the FIFO submodule, and the back-end module issues a descriptor to read data from particles in the SSD;
the data carrying unit is used for enabling the rear-end module to carry the read data to the BM module;
the data judging unit is used for judging the completeness and consistency of the data read by the rear end module through the BM module, carrying the data read by the rear end module to the front end module to complete a command and end the flow if the data read by the rear end module meets requirements of the read command, and returning to the command judging unit if the data read by the rear end module meets requirements of the read command.
11. Computer device for SSD read exception recovery optimization, comprising a memory, a processor and a recovery optimization program for SSD read exceptions stored on the memory and executable on the processor, the recovery optimization program for SSD read exceptions when executed by the processor implementing the recovery optimization method for SSD read exceptions of any of claims 1-8.
12, non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a recovery optimization method for SSD read exceptions as recited in any of claims 1-8 at .
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112214300A (en) * | 2020-10-12 | 2021-01-12 | 北京泽石科技有限公司 | Command timeout processing method, processing device and computer readable storage medium |
| CN112214300B (en) * | 2020-10-12 | 2024-05-17 | 北京泽石科技有限公司 | Method and device for processing command timeout and computer readable storage medium |
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